. >>> a major setback in the nuclear disaster in japan. there was a dangerous jump in radiation at the damaged nuclear plant. officials say radioactive tee in the water is 10 million times higher than normal, and now they can't pump the seawater into the crippled reactors because it's corroding the equipment, so now the united states is helping bring in crucial fresh water. >> the u.s. navy has spent two owe has sent two naval barges loaded with 525,000 gallons of fresh water. meanwhile the air force has sent 500 tons of battled water aboard six c-130s to sendai for people desperate to get their hands on uncontaminated water. they are based 20 miles west of tokyo, home to 3,600 service men who feel just as much wrapped up in this disaster as japan's citizens. >> our hearts here go out to them. we grieve with those that have lost everything. >> at the fukushima plant, levels of radioactive iodine in the seawater are at 1,250 levels higher than safety limits, according to officials. but they do say by the time that enters the food chain it will have diluted and be safe for humans to heat. but ho